Brand new Japanese CD player, outstanding sound with millions of tiny little buttons that nobody can figure out?

Bad news is that resale value on your classic 108 just dropped a few hundred dollars on account of this aftermarket improvement, understandable if you want great tunes.

If nothing else, save the Becker Mexico system with all its fiddly bits in plastic bag....... Yes, it will add resale value to the car if you sell it exactly original and intact with radio knobs and face plate that match the console - irregardless of whether or not the tape player works.